It’s because of your initial complaint that “Absolutely players on dead realms should be given free transfers. Instead, Blizzard’s offering Classic WoW that opportunity.” People are pointing out that Bizzard is not offering Classic WoW that opportunity.
Personally, I think you might have a point that players should be encouraged off of dead realms so those realms can just be closed/consolidated, but that’s got nothing to do with Classic or with the server transfers that are currently being given out in Classic.